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Progress and Outlook of Microwave Assisted Pyrolysis in Biomass Gasification

Wu Shuang， Liu Jinyu， Liu Xinhao， Xia Qinglin， Deng Guichun， Wang Xin

Abstract （610）

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he biomass conversion to small molecule by gasification through pyrolysis is an important driving force to realize the replacement of fossil energy with bioenergy. Gasification through microwave⁃assisted pyrolysis is a common route for conversion of biomass to desired bioenergy and bioproducts. The review describes the technology of microwave enhanced pyrolysis and microwave⁃assisted catalytic gasification. In addition, this review discusses both the challenges and opportunities of biomass pyrolysis using microwave heating and the milestones that are necessary to be obtained in the future

2020, 40 (5): 22-27. DOI: 10.3969/j.issn.1672-6952.2020.05.004

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Synthesis, Characterization and Properties of Starch-Modified PET-PEG

Wu Shuang, Ren Jiaming, Wang Xin, Zang Shuliang

Abstract （510）

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Starch was reacted with polyethylene terephthalate polyethylene glycol (PET-PEG) copolymer using hexamethylenediisocyanate as a coupling agent in order to prepare new PET-PEG/ST copolymers. The obtained PET-PEG/ST was characterized by FTIR and 1HNMR spectroscopy, thermal analysis, and the water absorption and biodegradable tests. The results show that starch was attached to PET-PEG via couple reaction in the presence of hexamethylenediisocyanate. As compared to PETPEG, PET-PEG/ST has avariable thermal stability with decreasing melting temperature. PET-PEG/ST has degraded in aqueous solution with different pH under different levels, and the degradation rate of PET-PEG/ST in aqueous solution under different pH values from big to small order as follows: alkaline solution,acidic solution,neutral solution. PET-PEG/ST also tends to degrade in biologically active environments like amylase.

2014, 34 (6): 1-4. DOI: 10.3696/j.issn.1672-6952.2014.06.001

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Preparation of Cordierite Honeycomb Al2O3 Coating by Microwave Heating Method

Liu Yun, Wu Shuang, Guan Lei, Zang Shuliang

Abstract （410）

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The porous alumina washcoat coating on cordierite honeycomb was prepared by microwave heating method. The effects of different preparation parameters on the loading, crystal composition, and pore structure of the alumina coating were studied, and then the alumina washcoat prepared was characterized by BET and SEM tests. The results indicate that the alumina washcoat prepared by microwave heating method is stable and uniform with higher Al2O3 weight ratio, larger surface area and pore volume.

2014, 34 (4): 1-4. DOI: 10.3696/j.issn.1672-6952.2014.04.001

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Solution Polymerization of Polyphosphazenes

WU Shuang

Abstract （418）

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Poly phosphazenes with higher molecular weight and narrow polydispersitie s were synthesized from hex achlo rocyclotripho sphazene by solution polymerization and then characterized.A bubble -observing method , a substitute of traditional viscosity -observing , was developed to determine the end-point of the reaction.The factors of polymerization such as the amount of catalyst , solvent and temperature were investigated.The Purifying of two polyphosphazene derivatives were also discussed.The results show that poly phosphazenes with molecular weight above 2×105 and poly dispersity index of 1 .6 ～1 .7 can be obtained with 30 % ～ 40% yield based on poly(dichlorophosphazene).Polymerization conditions are as follows: hexachlo rocyclotripho sphazene 24 g , sulfamic acid 50 ～ 55 mg , CaSO4 · 2H2O 45 mg , 1, 2, 4 - trichloro benzene 20 m L, reaction temperature 210 ～ 215 ℃.

2007, 27 (2): 16-19.